The line in EoJ (and RDM's subsequent comment in the podcast for that ep) that Kara was 'catting around' on Sam with pretty much everyone before she and Lee got involved. It came out of RDM's desire to make that who Kara was without having noticed at all what she had actually done up until then. Also, the near frak w/ Lee on the table. Still on the fence about whether it could have actually happened, but mostly just the most anti-climactic baggage ever. Zack's death was much better. Er. That doesn't sound quite right.